comprehensive annual maintenance contract of creative digital epabx system installed at kilokri office complex . , comprehensive maintenance contract of epabx creative make digital epabx inclusive its general checking through day to day complaints , replacement of defective / damaged parts power pack and its intercom / telephone line complete as required for the period of three years . ( 1 no . for 36 months ) , comprehensive maintenance contract of push button type telephone set complete with all accessories etc . as required . 20 nos . , s&d of following size telephone wire in the existing pipe / channel / surfaced / i / c connections etc . as required . ( a ) two pair wire . , supply & fixing of push button telephone set cli . , supply & fixing of digital telephone set .